Dust-collector



(No Mod-ell) l A. C. BRANTINGHAM. DUST COLLECTOR.

No. .470',035 Patented Marl 1, 1892.

ATENT rricE.

ALLEN C. BRANTINGHAM, OF COLUMBUS, OHIO.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 470,035, dated March 1,1892. Application iiled March 27, 1891. Serial No. 386.720. (No model.)

To a/ZZ whom it may concern.-

Be it known that I, ALLEN C.'BRANTING. HAM, a citizen of the UnitedStates, residing at Columbus, in the county of Franklin and State ofOhio, have invented a certain new and useful Improvement inDust-Collectors, of which the following is a specification.

My invention relates to an improvement in dust collecting and separatingdevices, and has particular relation to that class of dust collectingand separating mechanism employed in iiour or other millingestablishments.

The objects of my invention are to construct an improved device of thisclass by means of which a thorough separation of the dust and air of adust-laden air-currentis obtained, to accomplish this object in a simpleand reliable manner, to provide in connection therewith improved meansfor discharging the dust collected thereby, and to produce saidcollecting and separating device in a compact and inexpensive form.These objects I accomplish in the manner illustrated in the accompanyingdrawings, in which- Figure 1 is a vertical sectional view of my improveddust-collector, taken on two planes, as indicated at and z e' of FigA 2;and Fig. 2 is a central sectional view. taken through the device on liney y of Fig. 1.

Similarletters and numerals refer to similar parts throughout theseveral views.

a represents the exterior casing of my improved dust-collector, whichmay be of the rectangular form shown or of any other desired form. Ofthis exterior casing b b represent the side plates or faces, b b the endplates, and b2 the top plate, said casing being supported upon asuitable base-frame c. Said pieces b ale, as shown in the drawings,provided with oppositely-located central openings, (indicated at d.)Throughthe casing c and centers of the openings. d extends a fanshaftd', which may be 'journaled in any desirable frame-work in the outerside of said casing, and which carries, as shown at cl2, a suitablebelt-wheel.

Upon the shaft d is mounted centrally between the side walls of thecasing d thehub c of a fan, which is adapted, as hereinafter described,to rotate within said casing. This fan consists of a number of suitablearms f,

which radiate from the hub e and fan-vanes j" upon the outer portions ofsaid arms. The

fan thus constructed is partially incased by an 5 5 of the fan-vanes andbeing connected in their upper halves by a half-cylindrical cover-plateg. The inner casing-thus formed produces, as shown in the drawings, aninclosure of the upper half of the fan and two sides of the lower halfthereof. The side disks g of the interior casing are formed, as shown inthe drawings, with central openings, whichl are opposite the openings dof the exterior casing. As shown in the drawings, these side disks maybe provided about their side openings with tubular extensions g2, whichform linings for the case -openings d. Formed through the disk g andcasing side plates b at opposite points within a short distance of theperiphery of the inner casing is a circular slot or mortise m, which, asshown, surrounds the central openings CZ of the case,

Beneath the base-frame c and having its upper side communicating withthe lower side of the fan-oasingis the approximately V-shaped upperportion or mouth of a dustreceptacle t', which extends throughout thelength of the lower side of the fan-case. This dust-receptaclelcommunicates on its lower side with the open upper side of a trap ordischarge-chamber 12, the partially-cylindrical form of which isproduced by the concave opposite sides thereof. From the under sides ofthe concave sides of the discharge-chamber 12 lead the vparallel sidewalls of a downwardly-extending dust-chute 13. The dustchamber thusformed by the connection of mouth 1', partial cylindrical chamber 12,and chute 13 is provided with end-closing plates 14. Through the center.of the discharge- 4chamber 12 extends longitudinally the shaft of adust-trapping device lc, the ends of which are journaled in the endplate 14 of the dustdischarge chamber, and from the periphery of whichproject at equidistant points 1ongitudinal flanges or carriers lo',which are of such width as when said shaft is rotated to IOO come intofrictional contact with the interior surface of the concave sides of thedischarge or trapping chamber l2. Rotary motion is imparted to thetrap-shaft through a suitablyoperated gear-Wheel n upon one of the outerprojecting ends of said shaft. The portions of the side casing-plateswhich are separated by the formation therein of the circular slots m maybe connected together by suitable pins or connecting-arms s, arranged atinterval in said slots. v

The operation of my device is as follows: The fan being set in motion bythe rotation of the shaft d', currents of dust-laden air are drawn intothe fan-case through the central openings d, from whence said dust-ladenair is driven by said fans toward the inner surface of the innercasing-plate g. The force of the current being thus directed outwardfrom the outer ends of the fan-vanes, the dust or other heavy'particlescontained in the dustladen air is driven against and follows the innersurface of the plate g', while the purified air which is separatedtherefrom iinds an outlet through the slotted openings m of the casing,as indicated by the arrow in Fig. 2. The dust or heavier particles whichfollow the inner surface of the plate g' are carried downward andallowed to drop into the nio u th of the dust-chamber, from whence thedust is deposited between the rotating flanges or arms L of the trappingchamber l2, and through the rotation of said arms the quantities of dustcollected between them is finally deposited through the chute 13.

From the construction and operation above described it will be seen thata suction of the dust-laden air is created toward the center of the fanthrough which said dust-laden currents enter the casing, and by themeans described the air and dust in said currents are readily separated,one being discharged through the chamber beneath and the other throughthe openings m near the outer side or periphery of the case. As willreadily be seen this method of separating the dust and air andcollecting the former is exceedingly simple and effective and isattained without the construction or use of complicated or expensivemechanism.

I-Iaving now fully described my invention, What I claim, and desire tosecure by Letters Patent, is-

l. In a dust-collecting device, the combination, With the casing havingan open lower side, central inlet-openings d, and oppositelylocated sideopenings m near the outer sides of said case, of a rotating fan-shaftd', extending transversely through the center of said casing, and a fanupon said shaft, substantially as specified.

2. In a dust-collecting device, the combination, with the outer casingd, having an open under side, central side openings d, and circularair-outlet openings m in said Walls of said case, and interior casing gg', open on its under side and having openings opposite andcorresponding with the case-openings cl and n, of arotatin g fan-shaftsupported transversely through the side casing, as described, and -a fanupon said shaft, the upper half of which is inclosed by said outercasing, substantially as described.

3. In a dust-collecting device, the combination, with the casing havingan open under side, central side openings d, and oppositelylocated sideopenings m near the outer portion of said casing, of a rotatingfan-shaft d',

a extending transversely through said casing,

a fan mounted upon said shaft, a dust-chamber beneath and communicatingwith said casing, consisting of a portion c', a chute 13, an interveningpartially-cylindrical trapping chamber 12, communicatingwith said mouthand chute, and a rotating shaft journaled Within said dust-trappingchamber, and conveying-'fianges la upon said shaft and rotated infrictional contact with the curved side Walls of said trapping-chamber,substantially as specified.

y ALLEN C. BRANTINGHAM. In presence of- BARTON GRIFFITH, C. C. SHEPHERD.

